Read Sony CMT-ED1 / HCD-ED1 / HCD-ED1A Service Manual online
– 10 –
2. Mode : Playback
2. Mode: Playback
Confirm pla ybac k the signal recor
ded in step 1 become adjustment
level as f ollo ws.
If these le vels do not adjustment le
If these le vels do not adjustment le
vel, adjustment the
VR701 (L-
CH) and VR702 (R-CH) on the TAPE PREAMP boar d to repeat
steps 1 and 2.
steps 1 and 2.
A
d
j
u
s
t
m
e
n
t
l
e
v
e
l
Pla ybac k output of 10kHz le
vel diffrence
against 315Hz ref
erence should be
±
0.5 dB.
A
d
j
u
s
t
m
e
n
t
L
o
c
a
t
i
o
n
:
TAPE PREAMP boar d
Record Level Adjustment
P
r
o
c
e
d
u
r
e
:
1. Mode: Record
Confirm pla ybac k the signal recor
ded in step 1 become adjustment
level as f ollo ws.
If these le vels do not adjustment le
If these le vels do not adjustment le
vel, adjustment the
VR705 (L-
CH) and VR706 (R-CH) on the TAPE PREAMP boar d to repeat
steps 1 and 2.
steps 1 and 2.
A
d
j
u
s
t
m
e
n
t
l
e
v
e
l
:
Pla ybac k le vel : 47.2 to 53.0 mV (–24.3 to –23.3 dB)
A
A
d
j
u
s
t
m
e
n
t
L
o
c
a
t
i
o
n
:
TAPE PREAMP boar d
Adjustment Location
[RELAY BOARD] (Component Side)
Record Bias Adjustment
P
r
o
c
e
d
u
r
e
:
1. Mode : Record
level meter
MD OUT (JK301)
set
recorded
position
position
AF OSC
attenuator
600
Ω
set
MD IN (JK301)
1) 315Hz
2) 10kHz
1) 315Hz
2) 10kHz
blank tape
CS-123
CS-123
50 mV (–23.8 dB)
}
AF OSC
attenuator
600
Ω
set
MD IN (JK301)
315Hz 50 mV (–23.8 dB)
315Hz 50 mV (–23.8 dB)
blank tape
CS-123
CS-123
VR770
level meter
MD OUT (JK301)
set
recorded
position
position
VR704
VR703
VR706
VR705
VR701
VR702
IC703
1
21
22
42
[TAPE PREAMP BOARD] (Component Side)
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